Favorites list context menu for effects

Nobody has claimed this yet.

We have a _lot_ of effects. There's nothing wrong with this, but it creates a slowdown in the user's workflow when finding effects, and I think this can be avoided.

My thought to remedy this is to add a favorites list for effects. You would be able to add effects to the favorites list from the current effects list, and you could access the favorites list by right clicking anywhere in the background of an effects container.

Most of us only use a handful of the effects, and we tend to repeatedly use many of the same ones. FL Studio has a similar system, though it defaults to having a number of effects in the list. You can, however, add external plugins to that list.

I've had this idea for a while, but I wanted to run it by a few more people before before I start working on it.

Start by examining the current effects list and the effects container's context-menu behavior. Define how effects are added to favorites, how the favorites list is opened, and what the default and external-plugin cases should do before implementing the feature.

Written by the indexing model from the issue text.